What does ISI stand for?

What does ISI stand for?

• A. Integrated Standby Indicator
• B. Internal System Indicator
• C. Integrated Speed Indicator
• D. Independent Standby Instrument

Answer: (A)

ISI stands for Integrated Standby Indicator. This is the cockpit backup instrument that provides essential flight data when the primary instruments aren’t available, helping the crew maintain control. It typically combines critical readings such as attitude and may include airspeed and altitude, depending on the aircraft’s system. The other phrasings don’t fit typical cockpit terminology. Internal System Indicator doesn’t describe a backup display. Integrated Speed Indicator would focus only on speed, not provide a full standby reference. Independent Standby Instrument implies a separate, non-integrated unit, which isn’t how standby backups are generally implemented in modern cockpits.

ISI stands for Integrated Standby Indicator. This is the cockpit backup instrument that provides essential flight data when the primary instruments aren’t available, helping the crew maintain control. It typically combines critical readings such as attitude and may include airspeed and altitude, depending on the aircraft’s system.

The other phrasings don’t fit typical cockpit terminology. Internal System Indicator doesn’t describe a backup display. Integrated Speed Indicator would focus only on speed, not provide a full standby reference. Independent Standby Instrument implies a separate, non-integrated unit, which isn’t how standby backups are generally implemented in modern cockpits.